METHOD OF OIL POOL DEVELOPMENT Russian patent published in 2014 - IPC E21B43/22 

FIELD: oil and gas industry.

SUBSTANCE: method includes extraction of the product through producers and injection of a working agent - water and polymer disperse system with modifying chemicals through injectors. According to the invention state of the deposit development is analysed against the current oil recovery factor and product water cut and when water cut of the product reaches 90% at the site in average and injectability of the injectors is equal to 250 m³/day then together with polymer disperse system aqueous solutions of surfactants or their package are injected as modifying chemicals. When water cut of the product varies from 70% up to 95% at the site in average and injectability of the injectors is equal to 250-350 m³/day then together with polymer disperse system aqueous solutions of salts of polyvalent metals are injected as modifying chemicals. When water cut of the product varies from 70% up to 99% at the site in average and injectability of the injectors is more than 350 m³/day then together with polymer disperse system aqueous solutions of crosslinking agents are injected as modifying chemicals. At that aqueous solutions of chemicals are injected with density at least per 10% higher than density of the injected water in the form of separate banks, in the form of their mixture with components of polymer disperse system and buffer volume of water between components of polymer disperse system.

EFFECT: increase in oil recover factor due to effective use of polymer disperse system.

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